The 20-year-old, who spent last season with Huddersfield Town as they earned promotion through the Championship play-offs, will spend 2017-18 on the south coast after extending his Chelsea deal until 2021.

Brighton boss Chris Hughton said of the forward: "The natural progression for Izzy, having enjoyed such a successful season in the Championship last season, was to step up to the Premier League and we are delighted he will be doing that with us, here at Brighton.